Publication
Title
Simultaneous motion correction and t-1 estimation in quantitative t-1 mapping: an ml restoration approach
Author
Abstract
In magnetic resonance imaging the spin-lattice relaxation time (T-1) of tissues is estimated from a set of T-1-weighted images. As the T-1 estimation is a voxel-wise estimation, correct alignment of the T-1-weighted images is crucial for T-1 mapping. Therefore, to correct for motion, the T-1-weighted images are often registered prior to the T-1 estimation. This two-step approach, however, does not provide an accurate motion detection due to the high dynamic contrast changes in the series of images. Moreover, interpolation effects during registration, propagate to the T-1 estimation. In this work, we propose a unified approach, where the motion estimation is integrated into the T-1 estimation procedure. The motion model parameters and T-1 parameters are jointly estimated using a Maximum Likelihood (ML) approach. Results on simulation and real data experiments show a substantial improvement in the precision and accuracy of the estimated T-1 map compared to the conventional two-step approach.
Language
English
Source (journal)
Proceedings. - Los Alamitos, Calif, 1994, currens
Source (book)
IEEE International Conference on Image Processing (ICIP), SEP 27-30, 2015, Quebec City, CANADA
Publication
New york : Ieee, 2015
Volume/pages
(2015), p. 3160-3164
ISI
000371977803058
Number
978-1-4799-8339-1
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 06.06.2016
Last edited 16.06.2017
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